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 /** @file postprocess.h
  *  @brief Definitions for import post processing steps
  */
 #pragma once
 #ifndef AI_POSTPROCESS_H_INC
 #define AI_POSTPROCESS_H_INC
 
 #include <assimp/types.h>
 
 #ifdef __GNUC__
 #   pragma GCC system_header
 #endif
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 // -----------------------------------------------------------------------------------
 /** @enum  aiPostProcessSteps
  *  @brief Defines the flags for all possible post processing steps.
  *
  *  @note Some steps are influenced by properties set on the Assimp::Importer itself
  *
  *  @see Assimp::Importer::ReadFile()
  *  @see Assimp::Importer::SetPropertyInteger()
  *  @see aiImportFile
  *  @see aiImportFileEx
  */
 // -----------------------------------------------------------------------------------
 enum aiPostProcessSteps
 {
 
     // -------------------------------------------------------------------------
     /** <hr>Calculates the tangents and bitangents for the imported meshes.
      *
      * Does nothing if a mesh does not have normals. You might want this post
      * processing step to be executed if you plan to use tangent space calculations
      * such as normal mapping  applied to the meshes. There's an importer property,
      * <tt>#AI_CONFIG_PP_CT_MAX_SMOOTHING_ANGLE</tt>, which allows you to specify
      * a maximum smoothing angle for the algorithm. However, usually you'll
      * want to leave it at the default value.
      */
     aiProcess_CalcTangentSpace = 0x1,
 
     // -------------------------------------------------------------------------
     /** <hr>Identifies and joins identical vertex data sets within all
      *  imported meshes.
      *
      * After this step is run, each mesh contains unique vertices,
      * so a vertex may be used by multiple faces. You usually want
      * to use this post processing step. If your application deals with
      * indexed geometry, this step is compulsory or you'll just waste rendering
      * time. <b>If this flag is not specified</b>, no vertices are referenced by
      * more than one face and <b>no index buffer is required</b> for rendering.
      * Unless the importer (like ply) had to split vertices. Then you need one regardless.
      */
     aiProcess_JoinIdenticalVertices = 0x2,
 
     // -------------------------------------------------------------------------
     /** <hr>Converts all the imported data to a left-handed coordinate space.
      *
      * By default the data is returned in a right-handed coordinate space (which
      * OpenGL prefers). In this space, +X points to the right,
      * +Z points towards the viewer, and +Y points upwards. In the DirectX
      * coordinate space +X points to the right, +Y points upwards, and +Z points
      * away from the viewer.
      *
      * You'll probably want to consider this flag if you use Direct3D for
      * rendering. The #aiProcess_ConvertToLeftHanded flag supersedes this
      * setting and bundles all conversions typically required for D3D-based
      * applications.
      */
     aiProcess_MakeLeftHanded = 0x4,
 
     // -------------------------------------------------------------------------
     /** <hr>Triangulates all faces of all meshes.
      *
      * By default the imported mesh data might contain faces with more than 3
      * indices. For rendering you'll usually want all faces to be triangles.
      * This post processing step splits up faces with more than 3 indices into
      * triangles. Line and point primitives are *not* modified! If you want
      * 'triangles only' with no other kinds of primitives, try the following
      * solution:
      * <ul>
      * <li>Specify both #aiProcess_Triangulate and #aiProcess_SortByPType </li>
      * <li>Ignore all point and line meshes when you process assimp's output</li>
      * </ul>
      */
     aiProcess_Triangulate = 0x8,
 
     // -------------------------------------------------------------------------
     /** <hr>Removes some parts of the data structure (animations, materials,
      *  light sources, cameras, textures, vertex components).
      *
      * The  components to be removed are specified in a separate
      * importer property, <tt>#AI_CONFIG_PP_RVC_FLAGS</tt>. This is quite useful
      * if you don't need all parts of the output structure. Vertex colors
      * are rarely used today for example... Calling this step to remove unneeded
      * data from the pipeline as early as possible results in increased
      * performance and a more optimized output data structure.
      * This step is also useful if you want to force Assimp to recompute
      * normals or tangents. The corresponding steps don't recompute them if
      * they're already there (loaded from the source asset). By using this
      * step you can make sure they are NOT there.
      *
      * This flag is a poor one, mainly because its purpose is usually
      * misunderstood. Consider the following case: a 3D model has been exported
      * from a CAD app, and it has per-face vertex colors. Vertex positions can't be
      * shared, thus the #aiProcess_JoinIdenticalVertices step fails to
      * optimize the data because of these nasty little vertex colors.
      * Most apps don't even process them, so it's all for nothing. By using
      * this step, unneeded components are excluded as early as possible
      * thus opening more room for internal optimizations.
      */
     aiProcess_RemoveComponent = 0x10,
 
     // -------------------------------------------------------------------------
     /** <hr>Generates normals for all faces of all meshes.
      *
      * This is ignored if normals are already there at the time this flag
      * is evaluated. Model importers try to load them from the source file, so
      * they're usually already there. Face normals are shared between all points
      * of a single face, so a single point can have multiple normals, which
      * forces the library to duplicate vertices in some cases.
      * #aiProcess_JoinIdenticalVertices is *senseless* then.
      *
      * This flag may not be specified together with #aiProcess_GenSmoothNormals.
      */
     aiProcess_GenNormals = 0x20,
 
     // -------------------------------------------------------------------------
     /** <hr>Generates smooth normals for all vertices in the mesh.
     *
     * This is ignored if normals are already there at the time this flag
     * is evaluated. Model importers try to load them from the source file, so
     * they're usually already there.
     *
     * This flag may not be specified together with
     * #aiProcess_GenNormals. There's a importer property,
     * <tt>#AI_CONFIG_PP_GSN_MAX_SMOOTHING_ANGLE</tt> which allows you to specify
     * an angle maximum for the normal smoothing algorithm. Normals exceeding
     * this limit are not smoothed, resulting in a 'hard' seam between two faces.
     * Using a decent angle here (e.g. 80 degrees) results in very good visual
     * appearance.
     */
     aiProcess_GenSmoothNormals = 0x40,
 
     // -------------------------------------------------------------------------
     /** <hr>Splits large meshes into smaller sub-meshes.
     *
     * This is quite useful for real-time rendering, where the number of triangles
     * which can be maximally processed in a single draw-call is limited
     * by the video driver/hardware. The maximum vertex buffer is usually limited
     * too. Both requirements can be met with this step: you may specify both a
     * triangle and vertex limit for a single mesh.
     *
     * The split limits can (and should!) be set through the
     * <tt>#AI_CONFIG_PP_SLM_VERTEX_LIMIT</tt> and <tt>#AI_CONFIG_PP_SLM_TRIANGLE_LIMIT</tt>
     * importer properties. The default values are <tt>#AI_SLM_DEFAULT_MAX_VERTICES</tt> and
     * <tt>#AI_SLM_DEFAULT_MAX_TRIANGLES</tt>.
     *
     * Note that splitting is generally a time-consuming task, but only if there's
     * something to split. The use of this step is recommended for most users.
     */
     aiProcess_SplitLargeMeshes = 0x80,
 
     // -------------------------------------------------------------------------
     /** <hr>Removes the node graph and pre-transforms all vertices with
     * the local transformation matrices of their nodes.
     *
     * If the resulting scene can be reduced to a single mesh, with a single
     * material, no lights, and no cameras, then the output scene will contain
     * only a root node (with no children) that references the single mesh.
     * Otherwise, the output scene will be reduced to a root node with a single
     * level of child nodes, each one referencing one mesh, and each mesh
     * referencing one material.
     *
     * In either case, for rendering, you can
     * simply render all meshes in order - you don't need to pay
     * attention to local transformations and the node hierarchy.
     * Animations are removed during this step.
     * This step is intended for applications without a scenegraph.
     * The step CAN cause some problems: if e.g. a mesh of the asset
     * contains normals and another, using the same material index, does not,
     * they will be brought together, but the first meshes's part of
     * the normal list is zeroed. However, these artifacts are rare.
     * @note The <tt>#AI_CONFIG_PP_PTV_NORMALIZE</tt> configuration property
     * can be set to normalize the scene's spatial dimension to the -1...1
     * range.
     */
     aiProcess_PreTransformVertices = 0x100,
 
     // -------------------------------------------------------------------------
     /** <hr>Limits the number of bones simultaneously affecting a single vertex
     *  to a maximum value.
     *
     * If any vertex is affected by more than the maximum number of bones, the least
     * important vertex weights are removed and the remaining vertex weights are
     * renormalized so that the weights still sum up to 1.
     * The default bone weight limit is 4 (defined as <tt>#AI_LMW_MAX_WEIGHTS</tt> in
     * config.h), but you can use the <tt>#AI_CONFIG_PP_LBW_MAX_WEIGHTS</tt> importer
     * property to supply your own limit to the post processing step.
     *
     * If you intend to perform the skinning in hardware, this post processing
     * step might be of interest to you.
     */
     aiProcess_LimitBoneWeights = 0x200,
 
     // -------------------------------------------------------------------------
     /** <hr>Validates the imported scene data structure.
      * This makes sure that all indices are valid, all animations and
      * bones are linked correctly, all material references are correct .. etc.
      *
      * It is recommended that you capture Assimp's log output if you use this flag,
      * so you can easily find out what's wrong if a file fails the
      * validation. The validator is quite strict and will find *all*
      * inconsistencies in the data structure... It is recommended that plugin
      * developers use it to debug their loaders. There are two types of
      * validation failures:
      * <ul>
      * <li>Error: There's something wrong with the imported data. Further
      *   postprocessing is not possible and the data is not usable at all.
      *   The import fails. #Importer::GetErrorString() or #aiGetErrorString()
      *   carry the error message around.</li>
      * <li>Warning: There are some minor issues (e.g. 1000000 animation
      *   keyframes with the same time), but further postprocessing and use
      *   of the data structure is still safe. Warning details are written
      *   to the log file, <tt>#AI_SCENE_FLAGS_VALIDATION_WARNING</tt> is set
      *   in #aiScene::mFlags</li>
      * </ul>
      *
      * This post-processing step is not time-consuming. Its use is not
      * compulsory, but recommended.
     */
     aiProcess_ValidateDataStructure = 0x400,
 
     // -------------------------------------------------------------------------
     /** <hr>Reorders triangles for better vertex cache locality.
      *
      * The step tries to improve the ACMR (average post-transform vertex cache
      * miss ratio) for all meshes. The implementation runs in O(n) and is
      * roughly based on the 'tipsify' algorithm (see <a href="
      * http://www.cs.princeton.edu/gfx/pubs/Sander_2007_%3ETR/tipsy.pdf">this
      * paper</a>).
      *
      * If you intend to render huge models in hardware, this step might
      * be of interest to you. The <tt>#AI_CONFIG_PP_ICL_PTCACHE_SIZE</tt>
      * importer property can be used to fine-tune the cache optimization.
      */
     aiProcess_ImproveCacheLocality = 0x800,
 
     // -------------------------------------------------------------------------
     /** <hr>Searches for redundant/unreferenced materials and removes them.
      *
      * This is especially useful in combination with the
      * #aiProcess_PreTransformVertices and #aiProcess_OptimizeMeshes flags.
      * Both join small meshes with equal characteristics, but they can't do
      * their work if two meshes have different materials. Because several
      * material settings are lost during Assimp's import filters,
      * (and because many exporters don't check for redundant materials), huge
      * models often have materials which are are defined several times with
      * exactly the same settings.
      *
      * Several material settings not contributing to the final appearance of
      * a surface are ignored in all comparisons (e.g. the material name).
      * So, if you're passing additional information through the
      * content pipeline (probably using *magic* material names), don't
      * specify this flag. Alternatively take a look at the
      * <tt>#AI_CONFIG_PP_RRM_EXCLUDE_LIST</tt> importer property.
      */
     aiProcess_RemoveRedundantMaterials = 0x1000,
 
     // -------------------------------------------------------------------------
     /** <hr>This step tries to determine which meshes have normal vectors
      * that are facing inwards and inverts them.
      *
      * The algorithm is simple but effective:
      * the bounding box of all vertices + their normals is compared against
      * the volume of the bounding box of all vertices without their normals.
      * This works well for most objects, problems might occur with planar
      * surfaces. However, the step tries to filter such cases.
      * The step inverts all in-facing normals. Generally it is recommended
      * to enable this step, although the result is not always correct.
     */
     aiProcess_FixInfacingNormals = 0x2000,
 
 
 
     // -------------------------------------------------------------------------
     /**
      * This step generically populates aiBone->mArmature and aiBone->mNode generically
      * The point of these is it saves you later having to calculate these elements
      * This is useful when handling rest information or skin information
      * If you have multiple armatures on your models we strongly recommend enabling this
      * Instead of writing your own multi-root, multi-armature lookups we have done the
      * hard work for you :)
    */
     aiProcess_PopulateArmatureData = 0x4000,
 
     // -------------------------------------------------------------------------
     /** <hr>This step splits meshes with more than one primitive type in
      *  homogeneous sub-meshes.
      *
      *  The step is executed after the triangulation step. After the step
      *  returns, just one bit is set in aiMesh::mPrimitiveTypes. This is
      *  especially useful for real-time rendering where point and line
      *  primitives are often ignored or rendered separately.
      *  You can use the <tt>#AI_CONFIG_PP_SBP_REMOVE</tt> importer property to
      *  specify which primitive types you need. This can be used to easily
      *  exclude lines and points, which are rarely used, from the import.
     */
     aiProcess_SortByPType = 0x8000,
 
     // -------------------------------------------------------------------------
     /** <hr>This step searches all meshes for degenerate primitives and
      *  converts them to proper lines or points.
      *
      * A face is 'degenerate' if one or more of its points are identical.
      * To have the degenerate stuff not only detected and collapsed but
      * removed, try one of the following procedures:
      * <br><b>1.</b> (if you support lines and points for rendering but don't
      *    want the degenerates)<br>
      * <ul>
      *   <li>Specify the #aiProcess_FindDegenerates flag.
      *   </li>
      *   <li>Set the <tt>#AI_CONFIG_PP_FD_REMOVE</tt> importer property to
      *       1. This will cause the step to remove degenerate triangles from the
      *       import as soon as they're detected. They won't pass any further
      *       pipeline steps.
      *   </li>
      * </ul>
      * <br><b>2.</b>(if you don't support lines and points at all)<br>
      * <ul>
      *   <li>Specify the #aiProcess_FindDegenerates flag.
      *   </li>
      *   <li>Specify the #aiProcess_SortByPType flag. This moves line and
      *     point primitives to separate meshes.
      *   </li>
      *   <li>Set the <tt>#AI_CONFIG_PP_SBP_REMOVE</tt> importer property to
      *       @code aiPrimitiveType_POINTS | aiPrimitiveType_LINES
      *       @endcode to cause SortByPType to reject point
      *       and line meshes from the scene.
      *   </li>
      * </ul>
      *
      * This step also removes very small triangles with a surface area smaller
      * than 10^-6. If you rely on having these small triangles, or notice holes
      * in your model, set the property <tt>#AI_CONFIG_PP_FD_CHECKAREA</tt> to
      * false.
      * @note Degenerate polygons are not necessarily evil and that's why
      * they're not removed by default. There are several file formats which
      * don't support lines or points, and some exporters bypass the
      * format specification and write them as degenerate triangles instead.
     */
     aiProcess_FindDegenerates = 0x10000,
 
     // -------------------------------------------------------------------------
     /** <hr>This step searches all meshes for invalid data, such as zeroed
      *  normal vectors or invalid UV coords and removes/fixes them. This is
      *  intended to get rid of some common exporter errors.
      *
      * This is especially useful for normals. If they are invalid, and
      * the step recognizes this, they will be removed and can later
      * be recomputed, i.e. by the #aiProcess_GenSmoothNormals flag.<br>
      * The step will also remove meshes that are infinitely small and reduce
      * animation tracks consisting of hundreds if redundant keys to a single
      * key. The <tt>AI_CONFIG_PP_FID_ANIM_ACCURACY</tt> config property decides
      * the accuracy of the check for duplicate animation tracks.
     */
     aiProcess_FindInvalidData = 0x20000,
 
     // -------------------------------------------------------------------------
     /** <hr>This step converts non-UV mappings (such as spherical or
      *  cylindrical mapping) to proper texture coordinate channels.
      *
      * Most applications will support UV mapping only, so you will
      * probably want to specify this step in every case. Note that Assimp is not
      * always able to match the original mapping implementation of the
      * 3D app which produced a model perfectly. It's always better to let the
      * modelling app compute the UV channels - 3ds max, Maya, Blender,
      * LightWave, and Modo do this for example.
      *
      * @note If this step is not requested, you'll need to process the
      * <tt>#AI_MATKEY_MAPPING</tt> material property in order to display all assets
      * properly.
      */
     aiProcess_GenUVCoords = 0x40000,
 
     // -------------------------------------------------------------------------
     /** <hr>This step applies per-texture UV transformations and bakes
      *  them into stand-alone vtexture coordinate channels.
      *
      * UV transformations are specified per-texture - see the
      * <tt>#AI_MATKEY_UVTRANSFORM</tt> material key for more information.
      * This step processes all textures with
      * transformed input UV coordinates and generates a new (pre-transformed) UV channel
      * which replaces the old channel. Most applications won't support UV
      * transformations, so you will probably want to specify this step.
      *
      * @note UV transformations are usually implemented in real-time apps by
      * transforming texture coordinates at vertex shader stage with a 3x3
      * (homogeneous) transformation matrix.
     */
     aiProcess_TransformUVCoords = 0x80000,
 
     // -------------------------------------------------------------------------
     /** <hr>This step searches for duplicate meshes and replaces them
      *  with references to the first mesh.
      *
      *  This step takes a while, so don't use it if speed is a concern.
      *  Its main purpose is to workaround the fact that many export
      *  file formats don't support instanced meshes, so exporters need to
      *  duplicate meshes. This step removes the duplicates again. Please
      *  note that Assimp does not currently support per-node material
      *  assignment to meshes, which means that identical meshes with
      *  different materials are currently *not* joined, although this is
      *  planned for future versions.
      */
     aiProcess_FindInstances = 0x100000,
 
     // -------------------------------------------------------------------------
     /** <hr>A post-processing step to reduce the number of meshes.
      *
      *  This will, in fact, reduce the number of draw calls.
      *
      *  This is a very effective optimization and is recommended to be used
      *  together with #aiProcess_OptimizeGraph, if possible. The flag is fully
      *  compatible with both #aiProcess_SplitLargeMeshes and #aiProcess_SortByPType.
     */
     aiProcess_OptimizeMeshes  = 0x200000,
 
 
     // -------------------------------------------------------------------------
     /** <hr>A post-processing step to optimize the scene hierarchy.
      *
      *  Nodes without animations, bones, lights or cameras assigned are
      *  collapsed and joined.
      *
      *  Node names can be lost during this step. If you use special 'tag nodes'
      *  to pass additional information through your content pipeline, use the
      *  <tt>#AI_CONFIG_PP_OG_EXCLUDE_LIST</tt> importer property to specify a
      *  list of node names you want to be kept. Nodes matching one of the names
      *  in this list won't be touched or modified.
      *
      *  Use this flag with caution. Most simple files will be collapsed to a
      *  single node, so complex hierarchies are usually completely lost. This is not
      *  useful for editor environments, but probably a very effective
      *  optimization if you just want to get the model data, convert it to your
      *  own format, and render it as fast as possible.
      *
      *  This flag is designed to be used with #aiProcess_OptimizeMeshes for best
      *  results.
      *
      *  @note 'Crappy' scenes with thousands of extremely small meshes packed
      *  in deeply nested nodes exist for almost all file formats.
      *  #aiProcess_OptimizeMeshes in combination with #aiProcess_OptimizeGraph
      *  usually fixes them all and makes them renderable.
     */
     aiProcess_OptimizeGraph  = 0x400000,
 
     // -------------------------------------------------------------------------
     /** <hr>This step flips all UV coordinates along the y-axis and adjusts
      * material settings and bitangents accordingly.
      *
      * <b>Output UV coordinate system:</b>
      * @code
      * 0y|0y ---------- 1x|0y
      * |                 |
      * |                 |
      * |                 |
      * 0x|1y ---------- 1x|1y
      * @endcode
      *
      * You'll probably want to consider this flag if you use Direct3D for
      * rendering. The #aiProcess_ConvertToLeftHanded flag supersedes this
      * setting and bundles all conversions typically required for D3D-based
      * applications.
     */
     aiProcess_FlipUVs = 0x800000,
 
     // -------------------------------------------------------------------------
     /** <hr>This step adjusts the output face winding order to be CW.
      *
      * The default face winding order is counter clockwise (CCW).
      *
      * <b>Output face order:</b>
      * @code
      *       x2
      *
      *                         x0
      *  x1
      * @endcode
     */
     aiProcess_FlipWindingOrder  = 0x1000000,
 
     // -------------------------------------------------------------------------
     /** <hr>This step splits meshes with many bones into sub-meshes so that each
      * sub-mesh has fewer or as many bones as a given limit.
     */
     aiProcess_SplitByBoneCount  = 0x2000000,
 
     // -------------------------------------------------------------------------
     /** <hr>This step removes bones losslessly or according to some threshold.
      *
      *  In some cases (i.e. formats that require it) exporters are forced to
      *  assign dummy bone weights to otherwise static meshes assigned to
      *  animated meshes. Full, weight-based skinning is expensive while
      *  animating nodes is extremely cheap, so this step is offered to clean up
      *  the data in that regard.
      *
      *  Use <tt>#AI_CONFIG_PP_DB_THRESHOLD</tt> to control this.
      *  Use <tt>#AI_CONFIG_PP_DB_ALL_OR_NONE</tt> if you want bones removed if and
      *  only if all bones within the scene qualify for removal.
     */
     aiProcess_Debone  = 0x4000000,
 
 
 
     // -------------------------------------------------------------------------
     /** <hr>This step will perform a global scale of the model.
     *
     *  Some importers are providing a mechanism to define a scaling unit for the
     *  model. This post processing step can be used to do so. You need to get the
     *  global scaling from your importer settings like in FBX. Use the flag
     *  AI_CONFIG_GLOBAL_SCALE_FACTOR_KEY from the global property table to configure this.
     *
     *  Use <tt>#AI_CONFIG_GLOBAL_SCALE_FACTOR_KEY</tt> to setup the global scaling factor.
     */
     aiProcess_GlobalScale = 0x8000000,
 
     // -------------------------------------------------------------------------
     /** <hr>A postprocessing step to embed of textures.
      *
      *  This will remove external data dependencies for textures.
      *  If a texture's file does not exist at the specified path
      *  (due, for instance, to an absolute path generated on another system),
      *  it will check if a file with the same name exists at the root folder
      *  of the imported model. And if so, it uses that.
      */
     aiProcess_EmbedTextures  = 0x10000000,
 
     // aiProcess_GenEntityMeshes = 0x100000,
     // aiProcess_OptimizeAnimations = 0x200000
     // aiProcess_FixTexturePaths = 0x200000
 
 
     aiProcess_ForceGenNormals = 0x20000000,
 
     // -------------------------------------------------------------------------
     /** <hr>Drops normals for all faces of all meshes.
      *
      * This is ignored if no normals are present.
      * Face normals are shared between all points of a single face,
      * so a single point can have multiple normals, which
      * forces the library to duplicate vertices in some cases.
      * #aiProcess_JoinIdenticalVertices is *senseless* then.
      * This process gives sense back to aiProcess_JoinIdenticalVertices
      */
     aiProcess_DropNormals = 0x40000000,
 
     // -------------------------------------------------------------------------
     /**
      */
     aiProcess_GenBoundingBoxes = 0x80000000
 };
 
 
 // ---------------------------------------------------------------------------------------
 /** @def aiProcess_ConvertToLeftHanded
  *  @brief Shortcut flag for Direct3D-based applications.
  *
  *  Supersedes the #aiProcess_MakeLeftHanded and #aiProcess_FlipUVs and
  *  #aiProcess_FlipWindingOrder flags.
  *  The output data matches Direct3D's conventions: left-handed geometry, upper-left
  *  origin for UV coordinates and finally clockwise face order, suitable for CCW culling.
  *
  *  @deprecated
  */
 #define aiProcess_ConvertToLeftHanded ( \
     aiProcess_MakeLeftHanded     | \
     aiProcess_FlipUVs            | \
     aiProcess_FlipWindingOrder   | \
     0 )
 
 
 // ---------------------------------------------------------------------------------------
 /** @def aiProcessPreset_TargetRealtime_Fast
  *  @brief Default postprocess configuration optimizing the data for real-time rendering.
  *
  *  Applications would want to use this preset to load models on end-user PCs,
  *  maybe for direct use in game.
  *
  * If you're using DirectX, don't forget to combine this value with
  * the #aiProcess_ConvertToLeftHanded step. If you don't support UV transformations
  * in your application apply the #aiProcess_TransformUVCoords step, too.
  *  @note Please take the time to read the docs for the steps enabled by this preset.
  *  Some of them offer further configurable properties, while some of them might not be of
  *  use for you so it might be better to not specify them.
  */
 #define aiProcessPreset_TargetRealtime_Fast ( \
     aiProcess_CalcTangentSpace      |  \
     aiProcess_GenNormals            |  \
     aiProcess_JoinIdenticalVertices |  \
     aiProcess_Triangulate           |  \
     aiProcess_GenUVCoords           |  \
     aiProcess_SortByPType           |  \
     0 )
 
  // ---------------------------------------------------------------------------------------
  /** @def aiProcessPreset_TargetRealtime_Quality
   *  @brief Default postprocess configuration optimizing the data for real-time rendering.
   *
   *  Unlike #aiProcessPreset_TargetRealtime_Fast, this configuration
   *  performs some extra optimizations to improve rendering speed and
   *  to minimize memory usage. It could be a good choice for a level editor
   *  environment where import speed is not so important.
   *
   *  If you're using DirectX, don't forget to combine this value with
   *  the #aiProcess_ConvertToLeftHanded step. If you don't support UV transformations
   *  in your application apply the #aiProcess_TransformUVCoords step, too.
   *  @note Please take the time to read the docs for the steps enabled by this preset.
   *  Some of them offer further configurable properties, while some of them might not be
   *  of use for you so it might be better to not specify them.
   */
 #define aiProcessPreset_TargetRealtime_Quality ( \
     aiProcess_CalcTangentSpace              |  \
     aiProcess_GenSmoothNormals              |  \
     aiProcess_JoinIdenticalVertices         |  \
     aiProcess_ImproveCacheLocality          |  \
     aiProcess_LimitBoneWeights              |  \
     aiProcess_RemoveRedundantMaterials      |  \
     aiProcess_SplitLargeMeshes              |  \
     aiProcess_Triangulate                   |  \
     aiProcess_GenUVCoords                   |  \
     aiProcess_SortByPType                   |  \
     aiProcess_FindDegenerates               |  \
     aiProcess_FindInvalidData               |  \
     0 )
 
  // ---------------------------------------------------------------------------------------
  /** @def aiProcessPreset_TargetRealtime_MaxQuality
   *  @brief Default postprocess configuration optimizing the data for real-time rendering.
   *
   *  This preset enables almost every optimization step to achieve perfectly
   *  optimized data. It's your choice for level editor environments where import speed
   *  is not important.
   *
   *  If you're using DirectX, don't forget to combine this value with
   *  the #aiProcess_ConvertToLeftHanded step. If you don't support UV transformations
   *  in your application, apply the #aiProcess_TransformUVCoords step, too.
   *  @note Please take the time to read the docs for the steps enabled by this preset.
   *  Some of them offer further configurable properties, while some of them might not be
   *  of use for you so it might be better to not specify them.
   */
 #define aiProcessPreset_TargetRealtime_MaxQuality ( \
     aiProcessPreset_TargetRealtime_Quality   |  \
     aiProcess_FindInstances                  |  \
     aiProcess_ValidateDataStructure          |  \
     aiProcess_OptimizeMeshes                 |  \
     0 )
 
 
 #ifdef __cplusplus
 } // end of extern "C"
 #endif
 
 #endif // AI_POSTPROCESS_H_INC

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